package cn.tedu;

import java.sql.*;
import java.util.Scanner;

public class Demo12 {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        System.out.println("请输入用户名:");
        String username = scan.nextLine();
        System.out.println("请输入密码:");
        String password = scan.nextLine();
        System.out.println("请输入昵称:");
        String nick = scan.nextLine();
        reg(username,password,nick);
    }
    public static void reg(String username,String password,String nick){
        try(
                Connection conn = DBUtils.getConn()
        ) {
            String sql = "select id from user where username=?";
            PreparedStatement ps = conn.prepareStatement(sql);
            ps.setString(1,username);
            ResultSet rs = ps.executeQuery();
            if(rs.next()){
                System.out.println("用户名已存在!");
                return;
            }
            String sql1 = "insert into user(username,password,nick) values(?,?,?)";
            PreparedStatement ps1 = conn.prepareStatement(sql1);
            ps1.setString(1,username);
            ps1.setString(2,password);
            ps1.setString(3,nick);
            ps1.executeUpdate();
            System.out.println("注册成功!!!");
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }
    }
}
